<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>天气案例</title>

  <!-- 引入Vue -->
  <script type="text/javascript" src="/vue/vue.js"></script>

</head>
<body>
  <!-- 创建一个容器 -->
  <div id="app">
    <h2>今天天气很{{info}}</h2>
    <!-- 绑定事件的时候，@xxx="yyy",可以写一些简单的语句 -->
    <!-- <button @click="isHot = !isHot">切换天气</button> -->
    <button @click="changeWeather">切换天气</button>

  </div>

  <script type="text/javascript">
    // 创建一个Vue实例
    const vm = new Vue({
      el: '#app',
      data: {
        isHot: true,
      },
      computed: {
        info() {
          return this.isHot ? '炎热' : '凉爽';
        }
      },
      methods: {
        changeWeather() {
          this.isHot = !this.isHot;
        }
      },
      
    })
  </script>
</body>
</html>